#### Public Exam Model Question Paper 2019 - 2020

11th Standard

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Computer Science

Time : 02:45:00 Hrs
Total Marks : 70

Part I

Choose the most suitable answer from the given four alternatives and write the option code with the corresponding answer.

15 x 1 = 15
1. Expand POST

(a)

Post on self Test

(b)

Power on Software Test

(c)

Power on Self Test

(d)

Power on Self Text

2. EBCDIC uses.....bit coding scheme.

(a)

2

(b)

4

(c)

8

(d)

16

3. What will be the value of of control line for read operation from RAM to MDR?

(a)

1

(b)

0

(c)

-1

(d)

2

4. Identify the usage of Operating Systems

(a)

Easy interaction between the human and computer

(b)

Controlling Input & Output Devices

(c)

Managing use of main memory

(d)

All the above

5. Which option is used to save the file?

(a)

Ctrl + s

(b)

Save

(c)

File+Save

(d)

All the above

6. Who was a Hungarian Mathematician?

(a)

G. Polya

(b)

John Wiley

(c)

Krysia Broda

(d)

Steve Vickers

7. If C is false just before the loop, the control flows through
1 SI
2 while C
3 S2
4 S3

(a)

S1 ; S3

(b)

S 1 ; S2 ; S3

(c)

S 1 ; S2 ; S2 ; S3

(d)

S 1 ; S2 ; S2 ; S2 ; S3

8. Using this recursive definition${ a }^{ n }=\begin{cases} 1\quad \quad \quad \quad \quad \quad ifn=0 \\ a\times { a }^{ n }-1\quad otherwise \end{cases}$how many multiplications are needed to calculate a10?

(a)

11

(b)

10

(c)

9

(d)

8

9. Which of the following datatype operations take more time to execute?

(a)

float

(b)

int

(c)

char

(d)

void

10. The set of statements that are executed again and again in iteration is called as:

(a)

condition

(b)

loop

(c)

statement

(d)

body of loop

11. How many types of scopes in C++?

(a)

4

(b)

5

(c)

3

(d)

2

12. Which of the following statement is false regarding procedural programming?
(i) All data items are local
(ii) suitable for small sized software application
(iii) Time consuming
(iv) Pascal is an example

(a)

Both (ii) and (iii)

(b)

Only (i)

(c)

Only (iv)

(d)

Both (i) and (iv)

13. class vehicle
{ int wheels;
public:
void input_ data(float,float);
void output_data();
protected:
int passenger;
};
class heavy_vehicle : protected vehicle {
int diesel_petrol;
protected:
protected:
public:
voidwrite_data(); };
class bus: private heavy_vehicle {
charTicket[20] ;
public:
void fetch_data(char);
voiddisplay_data(); };
};
The member function that can be accessed by an objects of bus Class is

(a)

input data(),

(b)

(c)

fetch _data()

(d)

All of these display _data()

14. Phishing and pharming and examples of

(a)

Social Engineering

(b)

Social Media

(c)

Malware

(d)

firewalls

15. The first version of Unicode introduced in the year

(a)

1990

(b)

1998

(c)

1991

(d)

1981

16. Part II

Answer any 6 questions. Question no. 24 is compulsory.

6 x 2 = 12
17. Write the two main categories of Printer.

18. What is multi-processing?

19. What is Open source Operating system?

20. Initially, farmer, goat, grass, wolf = L, L, L,.L and the farmer crosses the river with goat. Model the action with an assignment statement:

21. Write the algorithm specification to find minimum of 2 numbers.

22. Write the disadvantages of OOP.

23. Define inethods of a class and write its types

24. Mention any 2 reasons as to why the websites use cookies?

25. Write a short note on "Thamizpori".

26. Part III

Answer any 6 questions. Question no. 33 is compulsory.

6 x 3 = 18
27. Complete the Table
1) 0 +   _  = 0
2) _ +  0 = 1
3)  1+ 1 =  _
4) 0 + 1 =  _

28. Name the control flow statements used in an algorithm.

29. What are the differences between “Logical error” and “Syntax error”?

30. What is goto statement? Explain

31. What is Built-in functions?

32. Write a program to assign data to members of a structure variable and display the contents.

33. Define information hiding.

34. Write some facts about the execution of constructors and destructors in inheritance.

35. Differentiate Spyware and Ransomware.

36. Part IV

5 x 5 = 25
1. Explain the types of ROM.

Output:
Constructor without parameters ...
Parameterized constructor ...
Copy Constructor ....
Enter data ... 20 30
Object a:
The numbers are ..20 30
Thesum of the numbers are .. 50
Object b:
The numbers are..10 20
The sum of the numbers are .. 30
Object c..
The numbers are ..10 20
The sum of the numbers are .. 30

1. What is number system? Describe different number systems in detail.

2. Exchange the contents: Given two glasses marked A and B. Glass A is full of apple drink and glass B is full of grape drink. For exchanging the contents of glasses A and B, represent the state by suitable variables, and write the specification of the algorithm.

1. Observe the figure and mark all the window elements, Identify the version of the Windows Os.

2. Explain the types of symbols used in flowchart in detail.

1. Discuss the various generations of computers.

2. Explain switch-case with an example.

1. Explain process Management.

2. Explain recursive- problem solving.